--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/posixfile.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,237 @@
+"""Extended file operations available in POSIX.
+
+f = posixfile.open(filename, [mode, [bufsize]])
+ will create a new posixfile object
+
+f = posixfile.fileopen(fileobject)
+ will create a posixfile object from a builtin file object
+
+f.file()
+ will return the original builtin file object
+
+f.dup()
+ will return a new file object based on a new filedescriptor
+
+f.dup2(fd)
+ will return a new file object based on the given filedescriptor
+
+f.flags(mode)
+ will turn on the associated flag (merge)
+ mode can contain the following characters:
+
+ (character representing a flag)
+ a append only flag
+ c close on exec flag
+ n no delay flag
+ s synchronization flag
+ (modifiers)
+ ! turn flags 'off' instead of default 'on'
+ = copy flags 'as is' instead of default 'merge'
+ ? return a string in which the characters represent the flags
+ that are set
+
+ note: - the '!' and '=' modifiers are mutually exclusive.
+ - the '?' modifier will return the status of the flags after they
+ have been changed by other characters in the mode string
+
+f.lock(mode [, len [, start [, whence]]])
+ will (un)lock a region
+ mode can contain the following characters:
+
+ (character representing type of lock)
+ u unlock
+ r read lock
+ w write lock
+ (modifiers)
+ | wait until the lock can be granted
+ ? return the first lock conflicting with the requested lock
+ or 'None' if there is no conflict. The lock returned is in the
+ format (mode, len, start, whence, pid) where mode is a
+ character representing the type of lock ('r' or 'w')
+
+ note: - the '?' modifier prevents a region from being locked; it is
+ query only
+"""
+import warnings
+warnings.warn("The posixfile module is deprecated; "
+ "fcntl.lockf() provides better locking", DeprecationWarning, 2)
+
+class _posixfile_:
+ """File wrapper class that provides extra POSIX file routines."""
+
+ states = ['open', 'closed']
+
+ #
+ # Internal routines
+ #
+ def __repr__(self):
+ file = self._file_
+ return "<%s posixfile '%s', mode '%s' at %s>" % \
+ (self.states[file.closed], file.name, file.mode, \
+ hex(id(self))[2:])
+
+ #
+ # Initialization routines
+ #
+ def open(self, name, mode='r', bufsize=-1):
+ import __builtin__
+ return self.fileopen(__builtin__.open(name, mode, bufsize))
+
+ def fileopen(self, file):
+ import types
+ if repr(type(file)) != "<type 'file'>":
+ raise TypeError, 'posixfile.fileopen() arg must be file object'
+ self._file_ = file
+ # Copy basic file methods
+ for maybemethod in dir(file):
+ if not maybemethod.startswith('_'):
+ attr = getattr(file, maybemethod)
+ if isinstance(attr, types.BuiltinMethodType):
+ setattr(self, maybemethod, attr)
+ return self
+
+ #
+ # New methods
+ #
+ def file(self):
+ return self._file_
+
+ def dup(self):
+ import posix
+
+ if not hasattr(posix, 'fdopen'):
+ raise AttributeError, 'dup() method unavailable'
+
+ return posix.fdopen(posix.dup(self._file_.fileno()), self._file_.mode)
+
+ def dup2(self, fd):
+ import posix
+
+ if not hasattr(posix, 'fdopen'):
+ raise AttributeError, 'dup() method unavailable'
+
+ posix.dup2(self._file_.fileno(), fd)
+ return posix.fdopen(fd, self._file_.mode)
+
+ def flags(self, *which):
+ import fcntl, os
+
+ if which:
+ if len(which) > 1:
+ raise TypeError, 'Too many arguments'
+ which = which[0]
+ else: which = '?'
+
+ l_flags = 0
+ if 'n' in which: l_flags = l_flags | os.O_NDELAY
+ if 'a' in which: l_flags = l_flags | os.O_APPEND
+ if 's' in which: l_flags = l_flags | os.O_SYNC
+
+ file = self._file_
+
+ if '=' not in which:
+ cur_fl = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
+ if '!' in which: l_flags = cur_fl & ~ l_flags
+ else: l_flags = cur_fl | l_flags
+
+ l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFL, l_flags)
+
+ if 'c' in which:
+ arg = ('!' not in which) # 0 is don't, 1 is do close on exec
+ l_flags = fcntl.fcntl(file.fileno(), fcntl.F_SETFD, arg)
+
+ if '?' in which:
+ which = '' # Return current flags
+ l_flags = fcntl.fcntl(file.fileno(), fcntl.F_GETFL, 0)
+ if os.O_APPEND & l_flags: which = which + 'a'
+ if fcntl.fcntl(file.fileno(), fcntl.F_GETFD, 0) & 1:
+ which = which + 'c'
+ if os.O_NDELAY & l_flags: which = which + 'n'
+ if os.O_SYNC & l_flags: which = which + 's'
+ return which
+
+ def lock(self, how, *args):
+ import struct, fcntl
+
+ if 'w' in how: l_type = fcntl.F_WRLCK
+ elif 'r' in how: l_type = fcntl.F_RDLCK
+ elif 'u' in how: l_type = fcntl.F_UNLCK
+ else: raise TypeError, 'no type of lock specified'
+
+ if '|' in how: cmd = fcntl.F_SETLKW
+ elif '?' in how: cmd = fcntl.F_GETLK
+ else: cmd = fcntl.F_SETLK
+
+ l_whence = 0
+ l_start = 0
+ l_len = 0
+
+ if len(args) == 1:
+ l_len = args[0]
+ elif len(args) == 2:
+ l_len, l_start = args
+ elif len(args) == 3:
+ l_len, l_start, l_whence = args
+ elif len(args) > 3:
+ raise TypeError, 'too many arguments'
+
+ # Hack by davem@magnet.com to get locking to go on freebsd;
+ # additions for AIX by Vladimir.Marangozov@imag.fr
+ import sys, os
+ if sys.platform in ('netbsd1',
+ 'openbsd2',
+ 'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
+ 'freebsd6', 'freebsd7', 'freebsd8',
+ 'bsdos2', 'bsdos3', 'bsdos4'):
+ flock = struct.pack('lxxxxlxxxxlhh', \
+ l_start, l_len, os.getpid(), l_type, l_whence)
+ elif sys.platform in ('aix3', 'aix4'):
+ flock = struct.pack('hhlllii', \
+ l_type, l_whence, l_start, l_len, 0, 0, 0)
+ else:
+ flock = struct.pack('hhllhh', \
+ l_type, l_whence, l_start, l_len, 0, 0)
+
+ flock = fcntl.fcntl(self._file_.fileno(), cmd, flock)
+
+ if '?' in how:
+ if sys.platform in ('netbsd1',
+ 'openbsd2',
+ 'freebsd2', 'freebsd3', 'freebsd4', 'freebsd5',
+ 'bsdos2', 'bsdos3', 'bsdos4'):
+ l_start, l_len, l_pid, l_type, l_whence = \
+ struct.unpack('lxxxxlxxxxlhh', flock)
+ elif sys.platform in ('aix3', 'aix4'):
+ l_type, l_whence, l_start, l_len, l_sysid, l_pid, l_vfs = \
+ struct.unpack('hhlllii', flock)
+ elif sys.platform == "linux2":
+ l_type, l_whence, l_start, l_len, l_pid, l_sysid = \
+ struct.unpack('hhllhh', flock)
+ else:
+ l_type, l_whence, l_start, l_len, l_sysid, l_pid = \
+ struct.unpack('hhllhh', flock)
+
+ if l_type != fcntl.F_UNLCK:
+ if l_type == fcntl.F_RDLCK:
+ return 'r', l_len, l_start, l_whence, l_pid
+ else:
+ return 'w', l_len, l_start, l_whence, l_pid
+
+def open(name, mode='r', bufsize=-1):
+ """Public routine to open a file as a posixfile object."""
+ return _posixfile_().open(name, mode, bufsize)
+
+def fileopen(file):
+ """Public routine to get a posixfile object from a Python file object."""
+ return _posixfile_().fileopen(file)
+
+#
+# Constants
+#
+SEEK_SET = 0
+SEEK_CUR = 1
+SEEK_END = 2
+
+#
+# End of posixfile.py
+#